Head-gate lock



(No Model.)

L. ROBERTS. HEAD GATE LOCK.

Patented June 9, 1891.

UNITED STATES PATENT OFFICE.

LAFAYETTE ROBERTS, OF LONGMONT, COLORADO.

HEAD-GATE LOCK.

SPECIFICATION forming part of Letters Patent No. 453,706, dated June 9, 1891.

Application led December 9. 1890. Serial No. 374,056. (No model.)

To all whom t may concern:

Be it known that I, LAFAYETTE ROBERTS, of Longmont, Boulder county, Colorado, have invented certain new and useful Improvements in Head-Gates, of which the following is a specification.

This invention relates to head gates such as are employed in sluiceways and canals; and it consists in locking mechanism therefor, which prevents the movement of the gate by unauthorized persons.

The improvements are illustrated in the accompanying drawings, wherein- Figure l is a front view of a head-gate; Fig. 2, a top view thereof, and Figs. 3 and 4 views of parts in detail.

A is the headgate, which moves vertically in suitable ways in vertical beams B B, and O is a cross-bar above the vertical beams. Attached to the head-gate is a raising and lowering screw-rod D, which extends through the cross-bar and through a metal bearing-plate E thereon. Seated on this plate E is a raising and lowering nut F, internally threaded to engage the screw-rod D. This nut F has a horizontal annular iian ged base-plate G, whichrests and turns on the plate E. Covering this flange G is a cover Il, which is securely bolted to the cross-bar D. The nut F extends through an aperture in this cover, and the cover is recessed on its under side at d to permit the flanged base G to turn freely. By applying a Wrench to the nut F the headgate is raised or lowered.

To lock the head-gate in position, the flanged base G is provided on its periphery with a plurality of locking-notches l) b, with which a sliding bolt I engages. The bolt Works back and forth on the plate E in a guide-recess c in the cover l-l. The bolt is operated by a key which is inserted through a key-hole d in the cover, and is held in its open and closed positions by a springturnbler J, which is held in proper position in a recess ein the cover H.

I claim as my inventionl. A head-gate, its operating screw-rod, and the nut engaging said screw-rod, said nut having a hanged base having on its periphery a plurality of locking-notches, in combination with a sliding locking-bolt which engages said notches to lock said nut, substantially as set forth.

2. A head-gate, a cross-bar above the same, a bearing-plate E on thc upper surface of said cross-bar, a screw-rod secured to said headgate and extending through said cross-bar and bearing-plate, and a nut engaging said screw-rod and having a iianged base which seats and turns on said bearing-plate, said flanged base having in its periphery a plurality ot' locking-notches, in combination with a sliding bolt which slides on said bearingplate and co-operates with said notches, a spring-tumbler for holding said bolt in its several positions, and a cover which fits over said hanged base, bolt, and tumbler, said cover having an aperture through which said nut and said screw-rod extend and having on its under side guide-recesses for said flanged base-bolt and tumbler and having a key-hole, and said cover being secured to said crossbar, substantially as set forth.

ln witness whereof I have hereunto signed myname in the presence of two subscribing witnesses.

LAFAYETTE ROBERTS.

Witnesses:

LOWELL H. SMITH, J. K. SWEENY.` 

